Slate-muffler



(No Model.)

E. L` KRANS.

SLATB MUPFLER.

Patented Apr. 19, 1.892.

tu: mams Ferias wl, novo-umu., wnsumavun, 0.

PATENT OFFICE.

EDVARD L. KRANS, OF SLATINGTON, PENNSYLVANIA.v

vSLATE-lvl u FFLER.

SPECIFICATION forming part of Letters Patent No. 473,120, dated April 19, 1892.

Application ined February 24, 1891. serial No. 382,542. (No model.)

To all whom t may concern:

Be it known that I, EDWARD L. KRANS, a citizen of the United States, residing in the borough of Slatington, in the county of Lehigh and State of Pennsylvania, have invented a new and useful School-Slate, of which the following is a specilication.

This invention is an improvement in muffling devices for school-slate and other frames; and it consists, essentially, in a thick muffling-cord bent iirst into a series of Zigzags or return-bends and then laid around the edge of slate-frame and bent thereover, so that its bends are turned over and embrace the edge of the frame, and are respectively secured to the frame by compressing or forcing theV extremities of the bends into grooves or notches previously formed in the sides of frame, all of which will be clearly understood from the following description and claims.

Referring to the drawings by letters, Figure l represents a face view of a slate and frame having my improved muiiier applied. Fig. 2 is a detail view of a portion of the mnftlingcord ready for attachment to slate. Fig. 3 is a transverse detail section through the frame.

A represents the slate; B, the frame, which, as shown, has grooves c in its side faces parallel with the edge thereof.

CZ designates the muliiing-cord, which is thick and stout and of suitable material to cushion the edge of frame when applied thereto, being preferably formed with a wire core e, which will cause it to hold its shape better when bent, as in Fig. 2, and when the bends are turned over the edge of frame, as shown in Fig. 3, which tend to bind or clasp the edge of frame, particularly when the cord is compressed thereon. After the cord-bends are bent over the edge of frame, as shown,the eX- tremities of the bends are forced down into groove c or suitable recesses properly7 formed in the frame, and are thereby retained on the frame, and can be further secured by compressing the frame, so as to close the groove, or by filling the groove or recesses with a cement or other illing. The bends of the cord crossing and overlying the edge of frame present a series of bufling-surfaces, which Will render the frame noiseless, and as each bend is independently connected to the frame even if one breaks off the others are still fast, so that the durability of the frame is increased, particularly as the groove or recess does not extend through the frame.

l am aware that bufling strips or cords have been applied to frames and that such strips have been secured by lacing-cords either through openings in the frame or by catching the cord back and forth on hooks in the opposite 'faces of frame. Such I do not claim, as I employ a thick buiiing-cord which is bent into a series of return-bends, each one ot' which is independently secured over the edge of frame and to the opposite sides thereof. The employment of a filling of cement or other material to secure the bends in the recesses in which they are embedded renders it unnecessary to use a cord having awire core, so

that the invention is not limited to such a A EDVARD L. KRANS.

Witnesses:

DAVID MCKENNA, JOHN MORGAN. 

